138 lines
4.3 KiB
C++
138 lines
4.3 KiB
C++
// vi:ts=4
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// ----------------------------------------------------------------------------
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// Serial2LCD - simple demonstration printing characters from serial port
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// Created by Bill Perry 2020-06-28
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// bperrybap@opensource.billsworld.billandterrie.com
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//
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// This example code is unlicensed and is released into the public domain
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// ----------------------------------------------------------------------------
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//
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// This sketch is for Noritake CU-U series displays like the
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// Noritake CU20025ECPB-U1J or CU20025ECPB-W1J
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// The Noritake CU20025ECPB display is a 20x2 line VFD display.
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// It is not a hd44780 display but is nearly fully compatible with a hd44780
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// display. The only real difference is the backlight control.
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// So while this device is supported by the hd44780 library,
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// the subclass will do its best to emulatate hd44780 functions and map
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// them to equivalent functionality when possible.
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//
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// Sketch demonstrates how to read a message of characters from
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// serial port and display it on the LCD.
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// It takes advantage of the hd44780 library automatic line
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// wrapping capability.
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// See the LineWrap sketch for details about line wrapping.
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//
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// Configure LCD_COLS, LCD_ROWS and BAUDRATE if desired/needed
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// Expected behavior of the sketch:
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// - characters received from serial port are displayed on LCD
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// - CR and LF are ignored/dropped
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//
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// If initialization of the LCD fails and the arduino supports a built in LED,
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// the sketch will simply blink the built in LED with the initalization error
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// code.
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//
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// ----------------------------------------------------------------------------
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// See below for configuring the Arduino pins used.
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//
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// Noritake CU-U series LCD module pins
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// 1 - LCD gnd
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// 2 - VCC (5v)
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// 3 - not connected
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// 4 - RS Register Select (rs) --- connect to Arduino pin
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// 5 - Read/Write ------ connect to gnd
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// 6 - Enable (en) ----- connect to Arduino pin
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// 7 - Data 0 (db0) ----
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// 8 - Data 1 (db1) |-------- Not used in 4 bit mode
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// 9 - Data 2 (db2) |
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// 10 - Data 3 (db3) ----
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// 11 - Data 4 (db4) ---- connect to Arduino pin
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// 12 - Data 5 (db5) ---- connect to Arduino pin
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// 13 - Data 6 (db6) ---- connect to Arduino pin
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// 14 - Data 7 (db7) ---- connect to Arduino pin
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// ----------------------------------------------------------------------------
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#include <hd44780.h>
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#include <hd44780ioClass/hd44780_NTCU20025ECPB_pinIO.h> // Arduino pin i/o class header
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// declare Arduino pins used for LCD functions
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// and the lcd object
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#if defined (ARDUINO_ARCH_ESP8266)
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const int rs=D8, en=D9, db4=D4, db5=D5, db6=D6, db7=D7; // for esp8266 devices
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#else
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const int rs=8, en=9, db4=4, db5=5, db6=6, db7=7; // for all other devices
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#endif
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hd44780_NTCU20025ECPB_pinIO lcd(rs, en, db4, db5, db6, db7);
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// LCD geometry
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const int LCD_COLS = 16;
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const int LCD_ROWS = 2;
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const int BAUDRATE = 9600;
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void setup()
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{
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int status;
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// initalize Serial port
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Serial.begin(BAUDRATE);
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// initialize LCD with number of columns and rows:
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// hd44780 returns a status from begin() that can be used
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// to determine if initalization failed.
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// the actual status codes are defined in <hd44780.h>
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status = lcd.begin(LCD_COLS, LCD_ROWS);
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if(status) // non zero status means it was unsuccesful
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{
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// begin() failed
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Serial.print("LCD initalization failed: ");
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Serial.println(status);
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// blink error code using the onboard LED if possible
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hd44780::fatalError(status); // does not return
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}
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// turn on automatic line wrapping
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// which automatically wraps lines to the next lower line and wraps back
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// to the top when at the bottom line
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// NOTE:
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// noLineWrap() can be used to disable automatic line wrapping.
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// _write() can be called instead of write() to send data bytes
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// to the display bypassing any special character or line wrap processing.
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lcd.lineWrap();
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lcd.print("Serial2LCD");
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if(LCD_ROWS > 1)
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{
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lcd.setCursor(0,1);
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lcd.print("Baud:");
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lcd.print(BAUDRATE);
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}
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}
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void loop()
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{
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// check to see if characters available
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// indicating a message is coming in
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if (Serial.available())
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{
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// wait some time for rest of message to arrive
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delay(100);
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// Clear the display before showing the new message
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lcd.clear();
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// print the message on the LCD
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while (Serial.available() > 0)
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{
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char c;
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c = Serial.read();
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if(c != '\r' && c != '\n') // drop CR and LF characters
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lcd.write(c);
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}
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}
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}
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